Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Castle of the Teutonic Order in Malbork' has mentioned 'World Heritage' in the following places:
Occurrence Sentence Text Source
It is the largest castle in the world measured by land area and a UNESCO World Heritage Site.
[3] UNESCO designated the "Castle of the Teutonic Order in Malbork" and the Malbork Castle Museum a World Heritage Site in December 1997.
The developed part of the property designated as a World Heritage Site is 18.038xc2xa0ha (44.57 acres).